Missing addon in V2.78
Since 2.8 is changing every day there is no point for add-on creators to make their add-ons compatible with it, because the next update could make it incompatible again, which means many of them most likely won't be available until after 2.8 is officially released. For now though you could follow the tutorial in 2.79 and append it over to your 2.8 file.